Syringe valve



Dec. 17, 1968 0, voN DARDEL ET AL 3,416,567 I SYRINGE VALVE Filed Feb.12, 1965 INVENTORS. OTTO VON DA STA E GEORGE?) RDEL,

HANS G NST M 8 OLLE ROBERT TAU RMAN 'jas their ATTORNEYS United StatesPatent 3,416,567 SYRINGE VALVE Georges Otto von Dardel, Stockholm, HansGosta Enstrom, Ostertalje, and Olle Robert Tauberman, Djursholm, Sweden,assignor, by mesne assignments, to Viggo Aktiebolag, Halsingborg, SwedenFiled Feb. 12, 1965, Ser. No. 432,204

Claims priority, application Sweden, Feb. 20, 1964,

5 Claims. (Cl. 137-604) ABSTRACT OF THE DISCLOSURE The specificationdiscloses a syringe valve for infusion assemblies for simultaneousadministration of two fluids, comprising a housing having a mixingchamber intermediate an inlet and an outlet and an inlet for a secondfluid provided with a pressure responsive sealing closure.

The present invention is directed to a syringe valve for use in theparenteral administration of fluids. More specifically, this valve isdirected to the facilitation of the administration of supplementarymedicaments during the parenteral administration of fluid such as blood,and other infusion solutions.

The syringe valve is to .be used in conjunction with cannulae orhypodermic needles of the kind which are inserted into the vein of apatient to whom an infusion solution is to be administered. One end ofthe cannula is inserted into the patients vein and the other end isprovided with means for connecting the cannula to an infusion apparatuscontaining a reservoir of an infusion solution. Hitherto known cannuladevices have been provided with a tube extending from the body of thecannula proper, the opening of which is covered with a rubber membrane.After the penetration of the cannula into the patient and commencementof the infusion, supplementary medicaments can be simultaneouslyadministered by piercing the rubber membrane with a hypodermic needleand introducing the supplementary medicament into the flowing infusionsolution. However, in these devices there is a risk of contamination ofthe unprotected membrane. A further disadvantage is that particles ofrubber loosened from the rubber membrane by the penetration of theneedle may be introduced into the infusion solution and thence into thebody of the patient.

It is an object of this invention to provide a syringe valve for theadministration of supplementary medicaments simultaneously with theadministration of a prirnary medicament.

These and other related objects are achieved by a novel and improvedsyringe valve construction characterized by a feed-in orifice adapted toengage the discharge element of a reservoir of a supplementarymedicament or fluid, such as the tenon cone of a hypodermic typesyringe, and a normally closed resilient member which seals the feed-inorifice and which is responsive to pressure.

For a better understanding of the present invention, reference may behad to the accompanying drawing, in which:

FIGURE 1 is a sectional view of a valve assembly incorporating theinvention and showing a construction of an exemplary embodiment of theinvention for the simultaneous administration of a first and secondfluid; and

FIGURE 2 is a view partially in section of the valve of FIGURE 1 incommunication with a hypodermic type syringe.

Referring now to FIGURE 1, there is shown a syringe valve comprising avalve housing 2 having a base 3, an inlet orifice 4, an outlet orifice6, and a passageway 8 of circular cross-section, extending through thehousing and connecting the inlet and outlet orifices. The passageway isshown to be substantially wider at the inlet orifice end of the housingand defines a frustoconical mixing chamber 10, the small end of whichcommunicates with an outwardly flaring portion of the passagewayapproaching the outlet orifice. The housing is provided with an upwardlydirected conical tube 12 which surrounds a feed-in orifice 14communicating with the passageway 8 which serves as an inlet for thesupplementary medication. The conical tube 12 is adapted to receive andengage the tenon cone of a hypodermic syringe or other similar reservoirof supplementary medication. A closure member 13 for the tube 12 isprovided for use when supplementary medication is not to 'be given.

-The housing is further provided with a tubular insert 16 adapted toextend through the inlet orifice and which serves as an inlet for theinfusion solution and which is adapted to be connected to an infusionapparatus. The insertable end 18 of the tubular insert 16 of rigidmaterial is fitted with a resilient sleeve 20 arranged to contact theinternal edges of the feed-in orifice 14 and thereby seal the feed-inorifice when the tubular insert is properly seated within the housing 2.The outlet end 22 of the housing is adapted to form a liquid-tightconnection with a cannula by insertion into a tenon-receiving connectionon the cannula.

FIGURE 2 shows the barrel 24 and plunger 26 of a hypodermic typesyringe, the tenon cone 28 of which is inserted into tube 12. Depressionof the plunger 26 will cause the fluid in the syringe to flow throughthe feed-in orifice 14 into contact with sleeve 20' and depress theupper wall of the sleeve, thus opening the passageway 8 to the fluidwhich flows into the mixing chamber 10'.

When a cannula has been attached to the outlet end of the housing andinserted in a vein, the housing is attached to the patients body in sucha way that the entire device is fixed. Suitable means for fastening thedevice to the patient include the use of bandages or adhesive tape. Theinlet orifice of the housing is in communication with an infusionapparatus (not shown) by means of a hose oonnected to the tubularinsert.

When the infusion solution is fed to the patient, it streams through thepassageway. When a supplementary medication is to be administered theclosure member is opened and a reservoir of medication such as a syringewithout a cannula is inserted in the tube. When pressure is applied suchas by the depression of a plunger, the supplementary medication ispressed out of the reservoir through the feed-in orifice. In response tothe pressure from above the resilient valve member opens the feed-inorifice and the supplementary medication flows into the mixing chamberand is thence transported together with the infusion liquid to thepatients body. As soon as the injection pressure ceases, the resilientvalve member is again brought into sealing relation with the feed-inorifice partly as a result of its own resiliency and partly by theoutwardly exerted pressure of the flowing infusion solution.

The syringe valve housing and tubular insert may be constructed of anymaterial suitable for use in medical apparatus of the type describedsuch as stainless steel, heat-resistant plastic, and the like.

The valve may be made of any resilient and inert substance capable ofselectively sealing and opening the feed-in orifice in response to thepressure used to expel a liquid from a reservoir of the type generallyused in parenteral administration of medicaments. Illustrative resilientmaterials include, elastomeric materials including rubber, resilientplastic, such as polyethylene, polyvinyl chloride, and the like.

The resilient member employed to seal the feed-in orifice may, ofcourse, take many shapes without departing from the scope of theinvention. For example, the resilient member may be in the form of asemicircular lip carried on the end of the tubular insert. It would alsobe possible to provide a resilient member of varying shape permanentlyfixed within the passageway.

It will be appreciated by those skilled in the art that theabove-described embodiment is intended to be illustrative of theinvention and is susceptible to modification and variation withoutdeparting from the concept of the invention. The invention is deemed tobe limited only by the scope of the appended claims.

We claim:

1. A syringe valve for the simultaneous feeding of two liquids to beinjected into the body and adapted to be afiixed to the body of apatient, comprising a housing having an inlet orifice, and an outletorifice which is designed to be connected to a cannula; a passageway conmeeting the inlet and outlet orifices, a mixing chamber in saidpassageway; upwardly directed tenon-receiving means on the housingsurrounding a feed-in orifice in the housing wall, said tenon-receivingmeans being adapted to be connected to a reservoir of liquid medicationto be injected, said feed-in orifice communicating with the mixingchamber by a conduit; a yieldable resilient member positioned in saidmixing chamber in sealing contact with the feedin orifice, saidresilient member being adapted to be displaced away from said peripheryand partially collapsed under liquid pressure applied through saidfeed-in orifice so as to admit the liquid medication through saidfeed-in orifice and another liquid through said inlet orificesimultaneously to said mixing chamber, and means for connecting thesyringe valve to an infusion apparatus.

2. A syringe valve for the simultaneous feeding of two liquidscomprising: a valve housing having an inlet orifice and an outletorifice, the outlet orifice being adapted to be connected to a cannula,and the passageway extending through the housing connecting the inletand outlet orifices, a mixing chamber in said passageway; an upwardlydirected conical tube on the top of the housing surrounding a feed-inorifice in the wall of the housing communicating with the mixing chamberby a conduit, said conical tube being adapted to be connected to areservoir of liquid medication to be injected; a closure member for theconical tube; a tubular insert adapted to be inserted into the mixingchamber through the inlet orifice; a resilient member carried on the endof the tubular insert and positioned within the mixing chamber so as tocontact the periphery of the feed-in orifice, said resilient memberbeing adapted to be displaced away from said periphery and partiallycollapsed under liquid pressure applied through said feed-in orificefrom said reservoir so as to admit liquid medication through saidfeed-in,

orifice and another liquid through said inlet orifice simultaneously tosaid mixing chamber.

3. A syringe valve device for infusion assemblies, comprising a valvehousing having an inlet for the reception of a tubular insert and forthe connection of a hose leading from an infusion apparatus; an outleton said housing for mounting a cannula; the wall of said housingdefining a first cylindrical passageway portion communicating with saidinlet, a second cylindrical passageway portion communicating with saidoutlet and having a smaller diameter than said first passageway portion,and a tapered passageway portion connecting said first and secondpassageway portions; said inlet, outlet and tapered passageway portionsbeing aligned; a syringe connection socket defining a feed-in orifice insaid housing communicating with said first passageway portionintermediate said tapered passageway portion and said inlet, saidsyringe connection socket being adapted to be connected to a syringecontaining liquid medication to be injected; a resilient sleeve insertedin said first passageway portion and extending between said taperedpassageway portion and said feed-in orifice, said sleeve pressingresiliently against the wall defining said first passageway portion fornormally sealing said feed-in orifice from said first passageway portionand being defiectable from said wall defining said first passageway andpartially collapsible by liquid pressure exerted by a syringe insertedin said syringe connection socket, thereby to provide for simultaneousmixing of medication from said infusion apparatus and from said syringein said passageway.

4. The syringe valve of claim 2 wherein said resilient member is aresilient sleeve carried on the end of the tubular insert.

5. The syringe valve of claim 2 wherein said resilient member is aresilient lip carried on the end of the tubular insert.

References Cited UNITED STATES PATENTS 1,094,685 4/ 1914 Spangler128-274 X 2,770,234 11/1956 Nesset et al 128-214 3,057,350 10/1962Cowley 128-214 3,085,549 4/1963 Kacsuta 137-525 X 3,307,571 3/1967 Smith13(7-218 WILLIAM F. ODEA, Primary Examiner;

D. LAMBERT, Assistant Examiner.

US. Cl. X.R. 128-214, 274; 137-525

